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Universal and proximately universal limits

Part of: Fairly general properties Maps and general types of spaces defined by maps

Published online by Cambridge University Press:  09 April 2009

Zvonko Čerin  and
Jóse M. R. Sanjurjo
Zvonko Čerin
Affiliation:
Kopernikova 7 10020 Zagreb Croatia e-mail: [email protected]
Jóse M. R. Sanjurjo
Affiliation:
Departamento de Geometria y Topologia Facultad de Matemáticas Universidad Complutense28040 MadridSpain e-mail: [email protected]
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Abstract

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We present sufficient conditions on an approximate mapping F: X → Y of approximate inverse systems in order that the limit f: X → Y of F is a universal map in the sense of Holsztyński. A similar theorem holds for a more restrictive concept of a proximately universal map introduced recently by the second author. We get as corollaries some sufficient conditions on an approximate inverse system implying that the its limit has the (proximate) fixed point property. In particular, every chainable compact Hausdorif space has the proximate fixed point property.

Keywords

inverse systemapproximate inverse systeminverse limitmap of inverse systemsmap of approximate inverse systemsapproximate polyhedronuniversal mapproximately universal mapfixed point propertyproximate fixed point property

MSC classification

Secondary: 54D30: Compactness 54C55: Absolute neighborhood extensor, absolute extensor, absolute neighborhood retract (ANR), absolute retract spaces (general properties)
Type
Research Article
Information
Journal of the Australian Mathematical Society , Volume 61 , Issue 1 , August 1996 , pp. 96 - 105
Copyright
Copyright © Australian Mathematical Society 1996

References

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